Page 1. Page 2. Page 3. Page 4. Page 5. Page 6. Page 7. Page 8. Page 9. Page Page Page Page Page Page Page The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 45 mm tall. References: Datasheet &. Type E88CC was first introduced. Page 1. Page 2. Page 3. Page 4. Page 5. Page 6. Page 7. Page 8.
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Some tubes from equipment are sometimes actually never used. Meaning they are EI tubes. The frame grid ratasheet is so thin, when you open up a defective tube, you can not see it with the bare eye.
Even with top-name amplifier manufacturers we see the same old errors, resulting from arrogancy, like not reading a datasheet. Well, I think experience and detailed product knowledge is the same!
Used, but look and test like new. Clear white print like new, from spare equipment.
Only do these measurements inside your amplifier, when you have experience with this. They test all at 15mA, with grid voltage variation of less than 0,2 Volt!! However they bias not as trhey shouls in all circuits, and have slightly lower gain.
Buy only from reliable sources! When no, then skip this text. Is your ECC88 humming datasbeet making noise?
Leave it up to a technician otherwise.
6922/ECC88/E88CC double triode
What is best, we had a small lot, and we have been able to select them all in perfectly balanced and matched pairs. The VI Version is balanced and matched, per datasheet specification, this is highest quality. They are pre-selected in pairs. This is a very hard way of testing, since “good” tubes must still be rejected when they come from a production series where too many have failed the JAN tests. EHX new production under the microscope.
This is not possible for the most wanted part numebrs. Made on Philips machines. In many problem cases, the ECC88 is not used correct. To give you an idea, the size of a large bacteria is 5um. This pair has printed on the glass: It’s an incredible mess at the moment.
Order nr for a matched and balanced pair: Frame grid wires can be as thin as 10um, which is technologically speaking a masterpiece of fine mechanics. JAN tested, for higher reliability.
The next three boxes are a short overview of the most important thing to check, in case of a problem. Like this, and no other way!
Original old blue boxes. This is a jewel.
Left tube on the picture. They were supplied with first datqsheet tubes by the manufacturers, and the country of origin is always printed on the tubes.
On internet auction sites, tubes are re-labelled, retro-gold plated, re-branded and used tubes are put in re-printed new boxes with the stamps ne-newed. This batch had very good values.
TDSL Tube data [E88CC]
So with them, what you pay is what you get. This was told to me by a retired Telefunken Ulm Employee, so Dtasheet think this is very reliable information. Large dimension ECC88, with higher dissipation. Lucky on internet auction sites. For a pair, order two pieces, they are automatically packed as matched pairs if you do so. So if you order for instance tube 4 from this list, it is pre-matched with tube 8.
This is not normal for E88CC, test values can vary widely, and you have to take them as is.
Interesting detail with the tube box. Sorry, only one tube left. They are waiting for you there. Not directly compatible to ECC88, so a secret dayasheet if you can design your won circuits. These are no JJ Tubes. Used tubes of this type generally have more hum and noise. Done so in when these were made, but JAN testing is still used for semiconductors as well. This is probably f88cc best ECC88 ever made. The rejects were probably sold a standard 6N1P, this is normal.